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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Installation and Configuration | 15% | - Install Docker Engine on Linux, Windows, and macOS - Configure daemon options, logging, and storage drivers - Set up Docker Enterprise components |
| Topic 2: Images and Registry | 20% | - Work with Docker Hub and private registries - Manage image layers, tagging, and versioning - Write efficient Dockerfiles, multi-stage builds - Sign and verify images with Docker Content Trust |
| Topic 3: Security | 15% | - Scan images for vulnerabilities - Secure daemon and API communication - Apply security profiles and capabilities - Manage user access and roles |
| Topic 4: Storage | 10% | - Configure persistent storage and data management - Use volumes, bind mounts, and tmpfs - Backup, restore, and migrate data |
| Topic 5: Networking | 15% | - Understand bridge, overlay, and macvlan networks - Secure and troubleshoot container networking - Expose ports, publish services, and manage DNS |
| Topic 6: Orchestration | 25% | - Perform rolling updates and rollbacks - Create and manage services, stacks, secrets, and configurations - Deploy and manage Swarm clusters |
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NEW QUESTION # 25
Is this a way to configure the Docker engine to use a registry without a trusted TLS certificate?
Solution: Pass the '--insecure-registry' flag to the daemon at run time.
Answer: B
Explanation:
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NEW QUESTION # 26
Will this command ensure that overlay traffic between service tasks is encrypted?
Solution:docker service create --network --secure
Answer: B
Explanation:
Explanation
= The command docker service create --network --secure will not ensure that overlay traffic between service tasks is encrypted. This is because the --secure option is not a valid option for the docker service create command1. To ensure that overlay traffic between service tasks is encrypted, you need to use the --opt encrypted option when creating the overlay network with the docker network create command2. For example, to create an encrypted overlay network named my-net, you can use the following command:
docker network create --driver overlay --opt encrypted my-net
Then, you can use the --network my-net option when creating the service with the docker service create command3. For example, to create a service named my-service using the nginx image and the my-net network, you can use the following command:
docker service create --name my-service --network my-net nginx
References:
* docker service create | Docker Docs
* Use overlay networks | Docker Docs
* Create a service | Docker Docs
NEW QUESTION # 27
Does this describe the role of Control Groups (cgroups) when used with a Docker container?
Solution: role-based access control to clustered resources
Answer: B
Explanation:
Explanation
This does not describe the role of Control Groups (cgroups) when used with a Docker container, because role-based access control to clustered resources is not related to cgroups. According to the official documentation, cgroups are a Linux kernel feature that limits and isolates the resource usage of a group of processes, such as CPU, memory, disk I/O, network, etc. Docker can use cgroups to share available hardware resources to containers and optionally enforce limits and constraints.
References: https://docs.docker.com/config/containers/runmetrics/
https://bikramat.medium.com/namespace-vs-cgroup-60c832c6b8c8
NEW QUESTION # 28
Is this a supported user authentication method for Universal Control Plane?
Solution. x.500
Answer: B
Explanation:
x.500 is not a supported user authentication method for Universal Control Plane (UCP). UCP supports two types of user authentication methods: built-in and external1. Built-in authentication uses the UCP's own database to store and verify user credentials. External authentication uses an external LDAP or Active Directory service to manage user accounts and passwords1. x.500 is a standard for directory services, which can be used by LDAP or Active Directory, but it is not a user authentication method by itself2. References:
* User authentication | Docker Docs
* X.500 - Wikipedia
NEW QUESTION # 29
Is this an advantage of multi-stage builds?
Solution: optimizes Images by copying artifacts selectively from previous stages
Answer: B
Explanation:
Explanation
Optimizing images by copying artifacts selectively from previous stages is an advantage of multi-stage builds.
Multi-stage builds allow you to use multiple FROM statements in your Dockerfile, each starting a new stage of the build. You can selectively copy artifacts from one stage to another, leaving behind everything you don't want in the final image. This reduces the size and complexity of your images, and improves security and performance. References: https://docs.docker.com/build/building/multi-stage/,
https://docs.docker.com/engine/reference/builder/#copy
NEW QUESTION # 30
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